I'm still seeing a high number of stales from both cpuminer (using stratum proxy on LAN) and cgminer (latest 2.11.3 using stratum and --no-submit-stale) from multiple locations. My cpuminers using the stratum proxy are between ~3.5-0.8% stales and my instances of cgminer are seeing ~1.8% stale according to the "My Account" statistics.

Are these the expected stale percentages for stratum? They still seem a bit high.

Well, all I can say is that pool-wise stratum users average a much lower stalerate, normally under 1%.Also keep in mind that the "My Account" statistics take into account all the shares you submitted since the workers were created, unless you reset them.

I thought I seen something for failback pool for stratum proxy, or is this in my mind?

How would I set up stratum proxy to fallback to a secondary pool if primary pool goes down?

As far as I know the proxy itself doesn't support failover. If you were using a failover script for cpuminer I think you can keep using that, you just need to replace litecoinpool.org:9332 with yourlocaladdress:8332.

Well, all I can say is that pool-wise stratum users average a much lower stalerate, normally under 1%.Also keep in mind that the "My Account" statistics take into account all the shares you submitted since the workers were created, unless you reset them.

Yeah, I reset them this morning because I started to suspect higher than average stales.

Currently all my miners are around 1.5% stale. This doesn't seem much lower from when I was using getwork, but it might be because the pool is under more load?

When my new PC comes I can make some money now (or at least pay for the power) $4.32 (time of writing) Someone is messing with the market here!! From $0.66 (or less) last week to $4.32 what! Something is fishy here. If it staying close to this figure or increases litecoin miners can make some money! Yay

Regarding adaptive difficulty: Is it calculated on worker or user basis?

Worker.Because of how the Stratum protocol works, however, difficulty can only be set per connection, so if you use the proxy all the workers connecting through it will share the same share target/difficulty. Currently the behavior of the pool is to adapt the difficulty to the fastest worker connecting through the proxy.